American astronomer who has made numerous observations to attempt to fix the value of the Hubble
constant. 
Sandage showed a major modification was necessary in the value, even after corrected by Baade since
red-sensitive photographic plates indicated that some of the "stars" Hubble had identified in distant
galaxies 
were actually HII regions.
Overbye, D. Lonely Hearts of the Cosmos: The Scientific Quest for the Secret of the Universe.
New York: NY: Harper Collins, 1991.
Sandage, A. The Hubble Atlas of Galaxies. Washington, DC: Carnegie Institute of Washington, 1961.
Sandage, A. and Bedke, J. Carnegie Atlas of Galaxies, 2 vols. Washington, DC: Carnegie Institution, 1994.
Sandage, A. R.; Kron, R. G.; and Longair, M. S. The Deep Universe. New York: Springer-Verlag, 1995.
